(3,5-bis-trifluoromethylphenyl)-bromo-acetonitrile 、
(R)-2-ethyl-6,7-dimethyl-3,4-dihydro-2H-quinoxaline-1-carboxylic acid ethyl ester 在
2,6-二甲基吡啶 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 24.0h,
生成 (R,S)-4-[(3,5-bis-trifluoromethylphenyl)-cyano-methyl]-2-ethyl-6,7-dimethyl-3,4-dihydro-2H-quinoxaline-1-carboxylic acid ethyl ester 、 (R,R)-4-[(3,5-bis-trifluoromethylphenyl)-cyano-methyl]-2-ethyl-6,7-dimethyl-3,4-dihydro-2H-quinoxaline-1-carboxylic acid ethyl ester